beachcomber

beachcomber
  1. A vagrant seaman, usually of low character, who loiters about seaports, particularly on the shores and islands of the Pacific Ocean. (Naut.)
    I was fortunate enough, however, to forgather with a Scotchman who was a beach-comber.
    — F. T. Bullen.
  2. a vagrant living on a beach.
  3. a person who searches along a beach for objects of value, such as lost objects or seashells.